Square drill bit



FIG. 1 is a perspective view of a square drill bit according to the present invention;

FIG. 2 is a top plan view of the square drill bit of FIG. 1;

FIG. 3 is a front view of the square drill bit of FIG. 1;

FIG. 4 is a back view of the square drill bit of FIG. 1;

FIG. 5 is a left side view of the square drill bit of FIG. 1;

FIG. 6 is a right side view of the square drill bit of FIG. 1; and,

FIG. 7 is a perspective view of the driver drill bit of FIG. 1 in co-operation with a crown bit, wherein the broken lines illustrate components that form no part of the design.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a square drill bit, as shown and described. 